
Babbage's Analytical Engine, 1834-1871. (Trial model)
1871
1871
1905
1919
1870
1879
1920-1925
1917
1870
1903
1952-3
1895-1904
1901-1930
1907
1830 (original); 1967 (model)
1915-1925
1885
1880-1920
1890-1910
1895-1905
1901-1910
1920
circa 1897
1898
1902
1875
1880-1920
1901-1913
1918-1920
1898
1899
1901-1930
1877-1897
1889
1880
circa 1900
1925-1926
1901-1920
1884-1900
1900-1920
1890-1930
c.1912
circa 1915
1879-1896
1913
1888
1870-1888
1880-1900
before 1889
1870-1910
1901